Alloyed steel.



I JAMIE$ GHIW-TAED, 0F MQUNT VERNON, NEW ASSIG-NOBL T0 CEURCHWARDINTERNATIONAL STEM COMPANY, 0F NEW if ltlii, N. Y., A GORPGMTEON OE Toall whom it may concern:

Be it known that 1, JAMES Cmmorrwann, a subject of the King of England,residlng at Mount Vernon, in the county of Westchester and State of NewYork, have 111- vented certain new and useful Improvements in AlloyedSteel, of which the following is a full, clear, and exact description,such as will enable others skilled in the art to which it appertains tomake and use the same.

llhis invention relates to alloys containing iron or steel.

@ne of the objects of the invention is to provide an article of the kinddescribed which shall be highly capable of withstanding shock, impactand vibration.

Another object is to provide an article which shall possess desirableproperties for general manufacturing purposes.

Other objects will be in part obvious and in part pointed outhereinafter.

The alloy represented by the composition given below has been found topossess many excellent qualities which make it suitable for a widevariety of uses. The proportions of its constituents in per cent. byweight are as follows:

Steel, approximately 93. 410% Nickel, approximately 3. Chromium,approximately..-" 2.00% Vanadium, approximately 0.35% Manganese,approximately 0. 50% Silicon, approximately 0.25%

The steel preferably contains approximately 0.10 to 1.00% carbon.

In manufacturing the alloy the metals mentioned may be used as such orin the form of ferro-alloys thereof. When the lat- Silicon is preferablymixed with the other 7 ingredients in the form of the metal itself. Incarrying out the admixture the silicon is best added in a molten stateto a stream of molten fluid consisting of acombination of the otheringredients, or the silicon may be Patented 23, 1016,

nannw n, v I KLLQYED STEEL.

1 57 m Specification of Letters Patent.

' Ito Drawing.

Application filed March 1%, 1911. Serial Ito. 615,304.

addedin solid form, if it be broken into sufliciently small pieces. Caremust be taken 1n carrying out this addition of silicon to prevent anundue cooling of the stream of metal, for if the heat of the stream besuiticiently deadened lumps of uncombined silicon will be formed in theresulting mass.

The effect of the presence of vanadium has been carefully studied and ithas been found that when used in small quantities it serves to drive outoccluded gases from the molten metal and when present in amounts up to0.75% it also gives elasticity to the molecules. This elasticity of themetal strengthens adhesion and imparts throughout a quality whichofi'ers great resistance to impact, shock and vibrations. The presenceof silicon exercises the beneficial action of producing a steel havinggreat homogeneity and fineness of grain.

The alloys made in accordance with the formula given possess manydesirable prop-- erties. They are particularly useful when used as deckplates, for war vessels, and may be used as armor plate. Theyalsopossess peculiar properties which suit them for use as shafting and ingeneral where it is necessary to provide a metal capable of withstandingimpact, shock and vibration. The alloys are extremely tough and possessgreet durability and wearing qualities.

Having described my invention, what I claim as new and desire to secureby Letters Patent is:

As an article of manufacture, an alloy steel composed of the followingmaterials in Y approximately the proportions indicated.

Steel, approximately 93, 10% Nickel, approximately 3, 50%

Chromium, approximately 2, 00%

Vanadium, approximately 0.35% Manganese, approximately"..- 0. 50%Silicon, approximately 0.25%

In testimony whereof I afiix my signature in the presence of twowitnesses.

JAMES CHURCHW V7itnesses: a I

d. 'llnorvtson, 1L, 1%... Warson.

